From Otter Lake, hikers and canoeists head into the interior for glimpses of osprey and kingfisher, deer and black bear, coyote, fox, and abundant beaver. Some of the many unique features along the trails include lookouts, beaver ponds, abandoned mica mines, the remains of a homestead, extensive boardwalk and rock ridges. Wilderness skills courses are offered throughout the year; some by the Friends of Frontenac Park.

If you visit Frontenac Park, you may see remnants of previous historical habitation along the trails. There were in fact, over 15 homesteads within the border of what is today Frontenac Park. The 5,214 ha park includes the Tetsmine Loop Trail that passes by the remains of mica mines while the more southerly Slide lake Loop Trail leads hikers over some of the most rugged terrain in the park. Frontenac Park is open all year for backcountry camping and day use.